Motion-controlled light with arc lamp

Abstract

A motion-controlled light for movement about two independent axes is disclosed. The light includes a housing assembling having adjustably connected thereto a light assembly incorporating a high intensity arc lamp. The housing assembly is connected to a support assembly which provides for pivotal mounting of the housing assembly about the two axes. Separate fans are provided to cool the anode and the cathode of the arc lamp, providing a greater efficiency and longer life to the arc lamp.

What is claimed: 
     
       1. A motion-controlled light including a housing and a lamp connected thereto, comprising in combination: a support assembly having a fixed base and a movable base pivotally mounted thereto for pivotal movement of said movable base with respect to said fixed base about a first axis, said housing pivotally mounted to said movable base about a second axis;   motor means for pivoting said movable base about said first axis and for pivoting said housing about said second axis whereby said light has universal movement;   said fixed base including a platform and two end supports, said end supports supporting axles of said movable base, said axles connected to suspended hangers, which hangers carry a platform therebetween, said platform having second end supports connected thereto which pivotally connect to axles of said housing;   first motor means mounted on said fixed base, and operatively connected to said movable base for pivoting said movable base about said first axis, and second motor means mounted on said movable base and operatively connected to said light housing for pivoting said housing about said second axis.   
     
     
       2. The invention as defined in claim 1 wherein said first motor means includes a drive linkage interconnecting said motor and said axle of said hangers and said second motor means includes a second drive linkage interconnecting said motor and the axle of said housing. 
     
     
       3. The invention as defined in claim 2 wherein each of said drive linkages includes a drive link connected to said first and second motor means, a link and a connecting link connected to said axle of said hanger and said housing respectively. 
     
     
       4. The invention as defined in claim 1 wherein said lamp is connected to a light assembly, which light assembly is positioned along a central axis of said housing relative to a parabolic reflector contained in said housing. 
     
     
       5. The invention as defined in claim 4 wherein said light assembly includes cooling means for cooling said lamp, said cooling means including fans mounted at both ends of said light assembly and first and second air flow paths associated with each of said fans for cooling respective end sections of said lamp. 
     
     
       6. The invention as defined in claim 5 wherein said air flow paths are each segregated by baffles into two sections. 
     
     
       7. A high intensity light including an arc lamp, a reflector, a housing, and a support assembly for said housing, comprising in combination: a light assembly to which said arc lamp is connected and on which said housing is mounted, said light assembly having first and second fan means for moving air over ends of said arc lamp, said first fan means moving air along a first air flow path toward a top ferrule having longitudinally extending first baffles segregating said top ferrule into two chambers and positioning a top end section of said arc lamp therebetween, said top end section associated with one of a cathode or anode of said lamp, said top ferrule having an inlet for receiving air, said air passing through one chamber of said top ferrule and along the length of said top end section of said lamp, past a heat sink integrally formed with said top end section, through passages formed in said top end section to a second chamber of of said top ferrule and back along said heat sink through an outlet in said top ferrule, said second fan means moving air along a second air flow path toward a bottom ferrule having longitudinally-extending second baffles segregating said bottom ferrule into two chambers and positioning a bottom end section of said arc lamp therebetween, said bottom end section associated with the other of a cathode or anode of said lamp, said bottom ferrule having a second inlet for receiving air, said air passing through one chamber of said bottom ferrul and along the bottom end section of said lamp, through second passages formed in said bottom end section to a second chamber of said bottom ferrule and along said bottom end section and through an outlet in said bottom ferrule, said air moving between said housing and said reflector to cool said reflector, whereby the efficiency of said lamp is increased.   
     
     
       8. The invention as defined in claim 7 wherein the first air flow path inlet and outlet are both outside a space defined between the reflector and a lens cover extending across said housing. 
     
     
       9. The invention as defined in claim 7 wherein the light assembly includes at a top end thereof radially-extending struts slideably and adjustably connected at a terminal end thereof to said housing and said bottom end of said light assembly is slideably and adjustably connected to said housing. 
     
     
       10. The invention as defined in claim 9 wherein the bottom end connection between said light assembly and said housing includes PTFE bushings whereby thermal expansion of the light is accommodated by the connection between the light assembly and the housing. 
     
     
       11. The invention as defined in claim 7 wherein the housing of said light is pivotally connected to a support assembly, said support assembly including a fixed base portion and a movable base portion, said fixed base providing pivotal movement about a first axis and said movable base providing pivotal movement about a second axis, whereby said light has universal movement, motor means provided for operatively moving said movable base about said first axis and said housing about said second axis. 
     
     
       12. A motion-controlled light for projecting a parabolic beam of light in a preselected pattern, comprising in combination: a housing having openings at each end, a top end having a lens covering mounted thereacross;   a support assembly pivotally connected to said housing providing pivotal movement to said housing about two separate axes;   motor means connected to said support assembly for pivoting said housing about each of said two axes;   a light assembly slideably and adjustably connected to said housing along a central longitudinal axis thereof, said light assembly including a top end section and a bottom end section, said top end section including an integral heat sink; and   cooling means for said top and bottom end sections of said light assembly, first cooling means adjacent to said top end section including a fan for moving air across said heat sink and through passages formed in said top end section, an exit of said first cooling means located exteriorly of said lens cover, second cooling means including a second fan for moving air through said passages in said bottom end section, each of said top and bottom end sections including baffles requiring air flow movement down one side and up the other side of said respective top and bottom end sections.   
     
     
       13. The invention defined in claim 12 wherein each of said top and bottom end sections are enclosed within top and bottom duct caps, each of said duct caps supporting said baffles interiorly thereof and extending longitudinally thereof to a position adjacent to said top and bottom end sections, each of said duct caps including an inlet adjacent to said first and second fans and an outlet, whereby air movement across said end sections is maximized and maximum heat dissipation possible. 
     
     
       14. The invention as defined in claim 12 wherein the top end of said light assembly includes radially extending struts slideably connected at a terminal end thereof to said housing and the bottom end of said light assembly includes radially-extending bolts passing through said housing, said struts and bolts aligned with slots in said housing whereby tightening or loosening the connection between said struts and bolts and said housing allows slideable movement of said light assembly relative to the parabolic reflector of said light.